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2b571a06 OJ |
1 | /* |
2 | * Copyright (C) 2007 PA Semi, Inc | |
3 | * | |
4 | * Maintained by: Olof Johansson <olof@lixom.net> | |
5 | * | |
6 | * Based on drivers/pcmcia/omap_cf.c | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | */ | |
22 | ||
23 | #include <linux/module.h> | |
24 | #include <linux/kernel.h> | |
25 | #include <linux/sched.h> | |
26 | #include <linux/platform_device.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/init.h> | |
29 | #include <linux/delay.h> | |
30 | #include <linux/interrupt.h> | |
27ac792c | 31 | #include <linux/mm.h> |
2b571a06 | 32 | #include <linux/vmalloc.h> |
5af50730 RH |
33 | #include <linux/of_address.h> |
34 | #include <linux/of_irq.h> | |
ad19dbdb | 35 | #include <linux/of_platform.h> |
5a0e3ad6 | 36 | #include <linux/slab.h> |
2b571a06 OJ |
37 | |
38 | #include <pcmcia/ss.h> | |
2b571a06 OJ |
39 | |
40 | static const char driver_name[] = "electra-cf"; | |
41 | ||
42 | struct electra_cf_socket { | |
43 | struct pcmcia_socket socket; | |
44 | ||
45 | struct timer_list timer; | |
46 | unsigned present:1; | |
47 | unsigned active:1; | |
48 | ||
2dc11581 | 49 | struct platform_device *ofdev; |
2b571a06 OJ |
50 | unsigned long mem_phys; |
51 | void __iomem * mem_base; | |
52 | unsigned long mem_size; | |
53 | void __iomem * io_virt; | |
54 | unsigned int io_base; | |
55 | unsigned int io_size; | |
56 | u_int irq; | |
57 | struct resource iomem; | |
58 | void __iomem * gpio_base; | |
59 | int gpio_detect; | |
60 | int gpio_vsense; | |
61 | int gpio_3v; | |
62 | int gpio_5v; | |
63 | }; | |
64 | ||
65 | #define POLL_INTERVAL (2 * HZ) | |
66 | ||
67 | ||
68 | static int electra_cf_present(struct electra_cf_socket *cf) | |
69 | { | |
70 | unsigned int gpio; | |
71 | ||
72 | gpio = in_le32(cf->gpio_base+0x40); | |
73 | return !(gpio & (1 << cf->gpio_detect)); | |
74 | } | |
75 | ||
76 | static int electra_cf_ss_init(struct pcmcia_socket *s) | |
77 | { | |
78 | return 0; | |
79 | } | |
80 | ||
81 | /* the timer is primarily to kick this socket's pccardd */ | |
82 | static void electra_cf_timer(unsigned long _cf) | |
83 | { | |
84 | struct electra_cf_socket *cf = (void *) _cf; | |
85 | int present = electra_cf_present(cf); | |
86 | ||
87 | if (present != cf->present) { | |
88 | cf->present = present; | |
89 | pcmcia_parse_events(&cf->socket, SS_DETECT); | |
90 | } | |
91 | ||
92 | if (cf->active) | |
93 | mod_timer(&cf->timer, jiffies + POLL_INTERVAL); | |
94 | } | |
95 | ||
96 | static irqreturn_t electra_cf_irq(int irq, void *_cf) | |
97 | { | |
98 | electra_cf_timer((unsigned long)_cf); | |
99 | return IRQ_HANDLED; | |
100 | } | |
101 | ||
102 | static int electra_cf_get_status(struct pcmcia_socket *s, u_int *sp) | |
103 | { | |
104 | struct electra_cf_socket *cf; | |
105 | ||
106 | if (!sp) | |
107 | return -EINVAL; | |
108 | ||
109 | cf = container_of(s, struct electra_cf_socket, socket); | |
110 | ||
111 | /* NOTE CF is always 3VCARD */ | |
112 | if (electra_cf_present(cf)) { | |
113 | *sp = SS_READY | SS_DETECT | SS_POWERON | SS_3VCARD; | |
114 | ||
115 | s->pci_irq = cf->irq; | |
116 | } else | |
117 | *sp = 0; | |
118 | return 0; | |
119 | } | |
120 | ||
121 | static int electra_cf_set_socket(struct pcmcia_socket *sock, | |
122 | struct socket_state_t *s) | |
123 | { | |
124 | unsigned int gpio; | |
125 | unsigned int vcc; | |
126 | struct electra_cf_socket *cf; | |
127 | ||
128 | cf = container_of(sock, struct electra_cf_socket, socket); | |
129 | ||
130 | /* "reset" means no power in our case */ | |
131 | vcc = (s->flags & SS_RESET) ? 0 : s->Vcc; | |
132 | ||
133 | switch (vcc) { | |
134 | case 0: | |
135 | gpio = 0; | |
136 | break; | |
137 | case 33: | |
138 | gpio = (1 << cf->gpio_3v); | |
139 | break; | |
140 | case 5: | |
141 | gpio = (1 << cf->gpio_5v); | |
142 | break; | |
143 | default: | |
144 | return -EINVAL; | |
145 | } | |
146 | ||
147 | gpio |= 1 << (cf->gpio_3v + 16); /* enwr */ | |
148 | gpio |= 1 << (cf->gpio_5v + 16); /* enwr */ | |
149 | out_le32(cf->gpio_base+0x90, gpio); | |
150 | ||
151 | pr_debug("%s: Vcc %d, io_irq %d, flags %04x csc %04x\n", | |
152 | driver_name, s->Vcc, s->io_irq, s->flags, s->csc_mask); | |
153 | ||
154 | return 0; | |
155 | } | |
156 | ||
157 | static int electra_cf_set_io_map(struct pcmcia_socket *s, | |
158 | struct pccard_io_map *io) | |
159 | { | |
160 | return 0; | |
161 | } | |
162 | ||
163 | static int electra_cf_set_mem_map(struct pcmcia_socket *s, | |
164 | struct pccard_mem_map *map) | |
165 | { | |
166 | struct electra_cf_socket *cf; | |
167 | ||
168 | if (map->card_start) | |
169 | return -EINVAL; | |
170 | cf = container_of(s, struct electra_cf_socket, socket); | |
171 | map->static_start = cf->mem_phys; | |
172 | map->flags &= MAP_ACTIVE|MAP_ATTRIB; | |
173 | if (!(map->flags & MAP_ATTRIB)) | |
174 | map->static_start += 0x800; | |
175 | return 0; | |
176 | } | |
177 | ||
178 | static struct pccard_operations electra_cf_ops = { | |
179 | .init = electra_cf_ss_init, | |
180 | .get_status = electra_cf_get_status, | |
181 | .set_socket = electra_cf_set_socket, | |
182 | .set_io_map = electra_cf_set_io_map, | |
183 | .set_mem_map = electra_cf_set_mem_map, | |
184 | }; | |
185 | ||
34cdf25a | 186 | static int electra_cf_probe(struct platform_device *ofdev) |
2b571a06 OJ |
187 | { |
188 | struct device *device = &ofdev->dev; | |
61c7a080 | 189 | struct device_node *np = ofdev->dev.of_node; |
2b571a06 OJ |
190 | struct electra_cf_socket *cf; |
191 | struct resource mem, io; | |
192 | int status; | |
193 | const unsigned int *prop; | |
194 | int err; | |
195 | struct vm_struct *area; | |
196 | ||
197 | err = of_address_to_resource(np, 0, &mem); | |
198 | if (err) | |
199 | return -EINVAL; | |
200 | ||
201 | err = of_address_to_resource(np, 1, &io); | |
202 | if (err) | |
203 | return -EINVAL; | |
204 | ||
205 | cf = kzalloc(sizeof *cf, GFP_KERNEL); | |
206 | if (!cf) | |
207 | return -ENOMEM; | |
208 | ||
209 | setup_timer(&cf->timer, electra_cf_timer, (unsigned long)cf); | |
210 | cf->irq = NO_IRQ; | |
211 | ||
212 | cf->ofdev = ofdev; | |
213 | cf->mem_phys = mem.start; | |
28f65c11 | 214 | cf->mem_size = PAGE_ALIGN(resource_size(&mem)); |
2b571a06 | 215 | cf->mem_base = ioremap(cf->mem_phys, cf->mem_size); |
28f65c11 | 216 | cf->io_size = PAGE_ALIGN(resource_size(&io)); |
2b571a06 OJ |
217 | |
218 | area = __get_vm_area(cf->io_size, 0, PHB_IO_BASE, PHB_IO_END); | |
801421eb JL |
219 | if (area == NULL) { |
220 | status = -ENOMEM; | |
221 | goto fail1; | |
222 | } | |
2b571a06 OJ |
223 | |
224 | cf->io_virt = (void __iomem *)(area->addr); | |
225 | ||
226 | cf->gpio_base = ioremap(0xfc103000, 0x1000); | |
227 | dev_set_drvdata(device, cf); | |
228 | ||
229 | if (!cf->mem_base || !cf->io_virt || !cf->gpio_base || | |
230 | (__ioremap_at(io.start, cf->io_virt, cf->io_size, | |
231 | _PAGE_NO_CACHE | _PAGE_GUARDED) == NULL)) { | |
232 | dev_err(device, "can't ioremap ranges\n"); | |
233 | status = -ENOMEM; | |
234 | goto fail1; | |
235 | } | |
236 | ||
237 | ||
238 | cf->io_base = (unsigned long)cf->io_virt - VMALLOC_END; | |
239 | ||
240 | cf->iomem.start = (unsigned long)cf->mem_base; | |
241 | cf->iomem.end = (unsigned long)cf->mem_base + (mem.end - mem.start); | |
242 | cf->iomem.flags = IORESOURCE_MEM; | |
243 | ||
244 | cf->irq = irq_of_parse_and_map(np, 0); | |
245 | ||
246 | status = request_irq(cf->irq, electra_cf_irq, IRQF_SHARED, | |
247 | driver_name, cf); | |
248 | if (status < 0) { | |
249 | dev_err(device, "request_irq failed\n"); | |
250 | goto fail1; | |
251 | } | |
252 | ||
253 | cf->socket.pci_irq = cf->irq; | |
254 | ||
255 | prop = of_get_property(np, "card-detect-gpio", NULL); | |
256 | if (!prop) | |
257 | goto fail1; | |
258 | cf->gpio_detect = *prop; | |
259 | ||
260 | prop = of_get_property(np, "card-vsense-gpio", NULL); | |
261 | if (!prop) | |
262 | goto fail1; | |
263 | cf->gpio_vsense = *prop; | |
264 | ||
265 | prop = of_get_property(np, "card-3v-gpio", NULL); | |
266 | if (!prop) | |
267 | goto fail1; | |
268 | cf->gpio_3v = *prop; | |
269 | ||
270 | prop = of_get_property(np, "card-5v-gpio", NULL); | |
271 | if (!prop) | |
272 | goto fail1; | |
273 | cf->gpio_5v = *prop; | |
274 | ||
275 | cf->socket.io_offset = cf->io_base; | |
276 | ||
277 | /* reserve chip-select regions */ | |
278 | if (!request_mem_region(cf->mem_phys, cf->mem_size, driver_name)) { | |
279 | status = -ENXIO; | |
280 | dev_err(device, "Can't claim memory region\n"); | |
281 | goto fail1; | |
282 | } | |
283 | ||
284 | if (!request_region(cf->io_base, cf->io_size, driver_name)) { | |
285 | status = -ENXIO; | |
286 | dev_err(device, "Can't claim I/O region\n"); | |
287 | goto fail2; | |
288 | } | |
289 | ||
290 | cf->socket.owner = THIS_MODULE; | |
291 | cf->socket.dev.parent = &ofdev->dev; | |
292 | cf->socket.ops = &electra_cf_ops; | |
293 | cf->socket.resource_ops = &pccard_static_ops; | |
294 | cf->socket.features = SS_CAP_PCCARD | SS_CAP_STATIC_MAP | | |
295 | SS_CAP_MEM_ALIGN; | |
296 | cf->socket.map_size = 0x800; | |
297 | ||
298 | status = pcmcia_register_socket(&cf->socket); | |
299 | if (status < 0) { | |
300 | dev_err(device, "pcmcia_register_socket failed\n"); | |
301 | goto fail3; | |
302 | } | |
303 | ||
fe333321 | 304 | dev_info(device, "at mem 0x%lx io 0x%llx irq %d\n", |
2b571a06 OJ |
305 | cf->mem_phys, io.start, cf->irq); |
306 | ||
307 | cf->active = 1; | |
308 | electra_cf_timer((unsigned long)cf); | |
309 | return 0; | |
310 | ||
311 | fail3: | |
312 | release_region(cf->io_base, cf->io_size); | |
313 | fail2: | |
314 | release_mem_region(cf->mem_phys, cf->mem_size); | |
315 | fail1: | |
316 | if (cf->irq != NO_IRQ) | |
317 | free_irq(cf->irq, cf); | |
318 | ||
319 | if (cf->io_virt) | |
320 | __iounmap_at(cf->io_virt, cf->io_size); | |
321 | if (cf->mem_base) | |
322 | iounmap(cf->mem_base); | |
323 | if (cf->gpio_base) | |
324 | iounmap(cf->gpio_base); | |
801421eb JL |
325 | if (area) |
326 | device_init_wakeup(&ofdev->dev, 0); | |
2b571a06 OJ |
327 | kfree(cf); |
328 | return status; | |
329 | ||
330 | } | |
331 | ||
e765a02c | 332 | static int electra_cf_remove(struct platform_device *ofdev) |
2b571a06 OJ |
333 | { |
334 | struct device *device = &ofdev->dev; | |
335 | struct electra_cf_socket *cf; | |
336 | ||
337 | cf = dev_get_drvdata(device); | |
338 | ||
339 | cf->active = 0; | |
340 | pcmcia_unregister_socket(&cf->socket); | |
341 | free_irq(cf->irq, cf); | |
342 | del_timer_sync(&cf->timer); | |
343 | ||
344 | __iounmap_at(cf->io_virt, cf->io_size); | |
345 | iounmap(cf->mem_base); | |
346 | iounmap(cf->gpio_base); | |
347 | release_mem_region(cf->mem_phys, cf->mem_size); | |
348 | release_region(cf->io_base, cf->io_size); | |
349 | ||
350 | kfree(cf); | |
351 | ||
352 | return 0; | |
353 | } | |
354 | ||
63c9a8b3 | 355 | static const struct of_device_id electra_cf_match[] = { |
2b571a06 OJ |
356 | { |
357 | .compatible = "electra-cf", | |
358 | }, | |
359 | {}, | |
360 | }; | |
c433a1b6 | 361 | MODULE_DEVICE_TABLE(of, electra_cf_match); |
2b571a06 | 362 | |
1c48a5c9 | 363 | static struct platform_driver electra_cf_driver = { |
4018294b | 364 | .driver = { |
4455d9fd | 365 | .name = driver_name, |
4018294b GL |
366 | .of_match_table = electra_cf_match, |
367 | }, | |
2b571a06 OJ |
368 | .probe = electra_cf_probe, |
369 | .remove = electra_cf_remove, | |
370 | }; | |
371 | ||
5d95f8e2 | 372 | module_platform_driver(electra_cf_driver); |
2b571a06 OJ |
373 | |
374 | MODULE_LICENSE("GPL"); | |
375 | MODULE_AUTHOR ("Olof Johansson <olof@lixom.net>"); | |
376 | MODULE_DESCRIPTION("PA Semi Electra CF driver"); |